Ok to start out, I have already called the farrier and he should be out sometime this after noon. My 21yo QH gelding is ever so slightly lame in the left front, however the hoof itself is a few degrees warmer then the left and back two. Nothing looks or feels wrong with the legs or other hooves. His temp pluse and cap refill are normal. He has not had a change in diet hay or grain wise, he has had a few mins a day eating grass, but not long and I was slowly building him up, just like I do every year. He is most defiantly not over weight, I keep him lean and trim because he is older and his arthritus acts up when he puts the pounds on. Last year at this same exact time he stepped on something sharp (we think a rock that worked its way up) and had a bad bruise and a small abscess. Treated it and took care of him and he was fine and in great shape till now. He is currently in his stall bedded deep with clean dry shavings. I can not see any damage or anything wrong with the hoof itself anywhere. He is currently barefoot, because he seems to do better without over the winter. I am so hoping that he just managed to find another rock to step on and its not founder or laminates.